<s>
In	O
computer	B-Application
software	I-Application
,	O
FreeON	B-Application
is	O
an	O
experimental	O
,	O
open	O
source	O
(	O
GPL	B-License
)	O
suite	O
of	O
programs	O
for	O
linear	O
scaling	O
quantum	O
chemistry	O
,	O
formerly	O
known	O
as	O
MondoSCF	B-Application
.	O
</s>
<s>
It	O
is	O
highly	O
modular	O
,	O
and	O
has	O
been	O
written	O
from	O
scratch	O
for	O
N-scaling	O
SCF	O
theory	O
in	O
Fortran95	B-Application
and	O
C	B-Language
.	O
Platform	O
independent	O
IO	O
is	O
supported	O
with	O
HDF5	B-Application
.	O
</s>
<s>
FreeON	B-Application
should	O
compile	O
with	O
most	O
modern	O
Linux	B-Application
distributions	O
.	O
</s>
<s>
FreeON	B-Application
performs	O
Hartree	O
–	O
Fock	O
,	O
pure	O
density	O
functional	O
,	O
and	O
hybrid	O
HF/DFT	O
calculations	O
(	O
e.g.	O
</s>
